Electrostatic coating of small falling objects
CA 2246790 A1 · Owner: Johansson, Hasse · Inventors: Lindqvist, Anders
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a process and a device for producing an even and homogeneous coating of liquids or powders on small free-falling objects that are not earthed. The process and the device according to the invention are primarily intended for surface coating of medicinal products and foodstuffs. According to the invention, the non-earthed objects are positively or negatively charged in a suitable manner or not at all and are then caused to fall freely and individually through a substantially cylindrically-shaped zone (2), mainly along its central axis, where the coating substance having first, in a suitably manner, been charged with a charge of opposite polarity to that of …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 17, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.